package com.nowcoder.community.controller;

import com.google.code.kaptcha.Producer;
import com.nowcoder.community.entity.User;
import com.nowcoder.community.service.UserService;
import com.nowcoder.community.until.CommunityConstant;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.CookieValue;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import javax.imageio.ImageIO;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Map;

/**
 * @author: caoxinfang
 * @email: 2717176337@qq.com
 * @date: 2022/3/11 21:53
 */
@Controller
public class LoginController implements CommunityConstant {

    private static final Logger logger = LoggerFactory.getLogger(LoginController.class);

    @Autowired
    private UserService userService ;

    @Autowired  // 生成验证码
    private Producer kaptchaProducer;

    @Value("${server.servlet.context-path}")
    private String contextPath;



    @RequestMapping(path = "/register", method = RequestMethod.GET)
    public String getRegisterPage(){
        return "/site/register";
    }

    // 登录页面
    @RequestMapping(path = "/login", method = RequestMethod.GET)
    public String getLoginPage(){
        return "/site/login";
    }

    @RequestMapping(path = "/register",method = RequestMethod.POST)
    public String register(Model model, User user) {

        Map<String,Object> map = userService.register(user);

        if (map == null || map.isEmpty()) {
            model.addAttribute("msg","注册成功，我们已经向您的邮箱发送了一封激活邮件，请尽快激活");

            model.addAttribute("target","/index");
            return "/site/operate-result";
        }else {
            /*三种为空的情况*/
            model.addAttribute("usernameMsg",map.get("usernameMsg"));
            model.addAttribute("passwordMsg",map.get("passwordMsg"));
            model.addAttribute("emailMsg",map.get("emailMsg"));
            return "/site/register";
        }

    }

    // 激活码的实现
    // http://localhost://8080/community/activation/101/code
    @RequestMapping(path = "/activation/{userId}/{code}",method = RequestMethod.GET)
    // @PathVariable 从路径中取值
    public String activation(Model model, @PathVariable("userId") int userId,
                             @PathVariable("code") String code){
        int result = userService.activation(userId, code);
        if (result == ACTIVATION_SUCCESS) {

            model.addAttribute("msg","激活成功，您的账号已经可以正常使用");
            model.addAttribute("target","/login");// 先定义
        }else if (result == ACTIVATION_REPEAT) {
            model.addAttribute("msg","无效操作，该账号已经激活过了");
            model.addAttribute("target","/index");// 先定义
        }else {
            model.addAttribute("msg","激活失败，激活码不正确");
            model.addAttribute("target","/index");// 先定义
        }
        return "/site/operate-result";

    }

    // 生成验证码
    @RequestMapping(path = "/kaptcha",method = RequestMethod.GET)
    public void getKaptcha(HttpServletResponse response, HttpSession session){
        // 生成验证码
        String text = kaptchaProducer.createText();
        // 把验证码转换成图片
        BufferedImage image = kaptchaProducer.createImage(text);

        // 将验证码存入session
        session.setAttribute("kaptcha",text);
        // 将图片输出给浏览器
        response.setContentType("image/png");
        // 获取输出流 字节流
        try {
            OutputStream os = response.getOutputStream();
            ImageIO.write(image,"png",os);
        } catch (IOException e) {
            logger.error("响应验证码失败：" + e.getMessage());
        }
    }

    // 登录验证
    @RequestMapping(path = "/login", method = RequestMethod.POST)
    public String login(String username, String password, String code, boolean rememberme,
                        Model model, HttpSession session, HttpServletResponse response){
        // 检查验证码
        String kaptcha = (String) session.getAttribute("kaptcha");
        if (StringUtils.isBlank(kaptcha) || StringUtils.isBlank(code) || !kaptcha.equalsIgnoreCase(code)){
            model.addAttribute("codeMsg","验证码不正确");
            return "/site/login";
        }

        // 检查账号，密码
        int expiredSeconds = rememberme ? REMEMBER_EXPIRED_SECONDS : DEFAULT_EXPIRED_SECONDS;
        Map<String,Object> map = userService.login(username,password,expiredSeconds);
        if (map.containsKey("ticket")) {
            Cookie cookie = new Cookie("ticket", map.get("ticket").toString());
            cookie.setPath(contextPath);
            cookie.setMaxAge(expiredSeconds);
            response.addCookie(cookie);
            return "redirect:/index";
        }else {
            model.addAttribute("usernameMsg",map.get("usernameMsg"));
            model.addAttribute("passwordMsg",map.get("passwordMsg"));
            return "/site/login";
        }

    }

    @RequestMapping(path = "/logout",method = RequestMethod.GET)
    /* 注解获取cookie*/
    public String logout(@CookieValue("ticket") String ticket){
        userService.logout(ticket);

        return "redirect:login";
    }



}
